Root's
crontab(5)
file
/etc/crontab
has to contain the line
*/5 * * * * root /usr/libexec/atrun
so that
atrun
gets invoked every five minutes.
At every invocation,
atrun
will start all the jobs in the lowercase queues whose start
time has elapsed.
In addition, if the load average over the last minute was less than
the specified limit then a maximum of one batch job (denoted by the
uppercase queues) is started.
Before starting a job,
atrun
will check the status of its owner's account with
pam(3)
and refuse to run the job if the account is unavailable,
e.g., locked out or expired.
OPTIONS
-l load_avg
Specify a limiting load factor, over which batch jobs should
not be run, instead of the compiled in default of 1.5.
-d
Debug; print error messages to standard error instead of using
syslog(3).
WARNINGS
For
atrun
to work, you have to start up a
cron(8)
daemon.
